Carrier 07E User Manual
Page 11
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PRESSURE DIFFERENTIAL
SEALING
BYPASS CYLINDER
-BYPASS PASSAGE
COMMUNICATES WITH
'SUCTION MANIFOLD
-SUCTION MANIFOLD
«
I DISCHARGE PRESSURE
LOADED OPERATION
Fig. 16 — Capacity Control Valve Operation
BYPASS PISTON PLUG
SPRING —^
CAPSCREWS
\
(NON INTERCHANGEABLE
X
WITH CONTROL VALVE
CAP SCREWS)
CAP SCREWS
(NONINTERCHANGEABLE
WITH FLANGE COVER
CAP SCREWS)
Fig. 17 — Removal of Capacity Control Valve
cap screws hold piston plug assembly in place.
Remove flange cover, spring, piston plug and seat
ring (Fig. 18). A tapped hole is provided in piston
to allow it to be pulled out. Hole has same thread
diameter as cap screws removed above.
-SEAT RING . .
FLANGE COVER
Fig. 18 — Removal of Bypass Piston Plug
SUCTION AND DISCHARGE VALVE
PLATE ASSEMBLY (Fig. 12)
Test
for leaking discharge valves by pumping
compressor down and observing suction and
discharge pressure equalization. If a discharge valve
is leaking their pressures will equalize rapidly.
Maximum allowable discharge pressure drop is 3
psi per minute.
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